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token-monster

A pixel-art monster in a side pane that eats tokens and shows context, limits and activity at a glance

Code you can checkTerminal + desktopPaneBandToastBoxButtonText

What it does

  • Draws a pane, a band above the prompt, toasts
  • Adds /token-monster
  • Watches tool calls and can refuse them
  • Hooks agent.spawn, classic.PermissionDenied, classic.PermissionRequest, classic.SessionStart and 11 more
  • Keeps its own state between turns

Good points

  • No network calls
  • Starts no processes
  • Written in TypeScript
  • Has a desktop-specific branch

Code to start from

Two kinds: a starter modscode writes from the design above, and the lines of the mod's own code that draw it.

Starter (register.tsx)

register.tsx
import type { Register } from 'claude-code'

// Drawn like token-monster by Carl Igelström (pane, band, toast), as modscode read it from the mod's code:
// https://modscode.com/gallery/ugglr-token-monster/
// Written by modscode from that reading, not copied from the mod: use it as you like.
// Each value below stands for one the mod works out at run time; put in your own.
export const register: Register = on => {
  // the pane: open it with $.ui.open({ id: 'my-pane', title: "token-monster" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const say = '…'
    const waitLine = '…'
    const percent = '…'
    const kilo = '…'
    const entry = '…'
    const entry2 = '…'
    const entry3 = '…'
    const name = '…'
    const used = '…'
    const left = '…'
    const name2 = '…'
    const used2 = '…'
    const left2 = '…'
    const name3 = '…'
    const used3 = '…'
    const left3 = '…'
    const rank = '…'
    const remark = '…'
    const dietLine = '…'
    return (
      <Box>
        <Text>
          {" "}
        </Text>
        <Box flexDirection="column">
          <Text bold>
            {say}
          </Text>
          <Text dimColor wrap="truncate-end">
            {waitLine}
          </Text>
          <Box>
            <Text dimColor>
              {"belly   "}
            </Text>
            <Text>
              ████████
            </Text>
            <Text>
              ████████
            </Text>
            <Text>
              ████████
            </Text>
            <Text dimColor>
              ░░░░░░░░
            </Text>
            <Text>
              ▒▒▒▒▒▒▒▒
            </Text>
            <Text>
              ▒▒▒▒▒▒▒▒
            </Text>
            <Text>
              ▒▒▒▒▒▒▒▒
            </Text>
            <Text>
              {` ${percent}%`}
              {" "}
              {`${kilo}/${kilo}`}
            </Text>
          </Box>
          <Box flexWrap="wrap">
            <Text>
              <Text>
                ▒
              </Text>
              <Text dimColor>
                {entry}
              </Text>
            </Text>
            <Text>
              <Text>
                ▒
              </Text>
              <Text dimColor>
                {entry2}
              </Text>
            </Text>
            <Text>
              <Text>
                ▒
              </Text>
              <Text dimColor>
                {entry3}
              </Text>
            </Text>
          </Box>
          <Box>
            <Text dimColor>
              {name}
            </Text>
            <Text>
              {used}
            </Text>
            <Text dimColor>
              {left}
            </Text>
            <Text>
              {` ${percent}%`}
              {" "}
            </Text>
          </Box>
          <Box>
            <Text dimColor>
              {name2}
            </Text>
            <Text>
              {used2}
            </Text>
            <Text dimColor>
              {left2}
            </Text>
            <Text>
              {` ${percent}%`}
              {" "}
            </Text>
          </Box>
          <Box>
            <Text dimColor>
              {name3}
            </Text>
            <Text>
              {used3}
            </Text>
            <Text dimColor>
              {left3}
            </Text>
            <Text>
              {` ${percent}%`}
              {" "}
            </Text>
          </Box>
          <Box>
            <Text dimColor>
              {`Lv ${rank}`}
            </Text>
            <Text>
              ━━━━━━━━
            </Text>
            <Text dimColor>
              ────────
            </Text>
            <Text dimColor>
              {` ${kilo} to Lv ${rank}1`}
            </Text>
          </Box>
          <Text dimColor>
            {remark}
          </Text>
          <Text color="yellow">
            {dietLine}
          </Text>
          <Box>
            <Button label="Monster" hotkey="m" plain />
            <Text>
              {" "}
            </Text>
            <Button label="Color" hotkey="c" plain />
            <Text>
              {" "}
            </Text>
            <Button label="Pet" hotkey="p" plain />
          </Box>
          <Box>
            <Button label="Diet: free context" hotkey="d" plain />
            <Text>
              {" "}
            </Text>
            <Button label="Sound: on" hotkey="s" plain />
          </Box>
          <Text dimColor>
            ctrl+x tab or a click gives me the keys
          </Text>
        </Box>
      </Box>
    )
  })

  // the band above the prompt; what else goes there is drawn under it
  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    const { Box, Text } = $.ui.resolve(e)
    const words = '…'
    const used = '…'
    const left = '…'
    const percent = '…'
    const tail = '…'
    return (
      <Box flexDirection="column">
        <Box paddingX={1}>
          <Text bold>
            {words}
          </Text>
          <Text>
            {` ${used}`}
          </Text>
          <Text dimColor>
            {left}
          </Text>
          <Text>
            {` ${percent}%`}
          </Text>
          <Text dimColor>
            {tail}
          </Text>
        </Box>
        {await next(e)}
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    const kilo = '…'
    await $.ui.toast(`Press Enter on /compact and me eat ~${kilo} tokens from the context.`)
    await $.ui.toast(`Me eating ~${kilo} tokens from the context. *burp*`)
    return next(e)
  })
}

The mod's own code

Shown under the mod's licence (MIT); its text is below. Keep the notice if you copy these lines.

hooks/register.tsx lines 1001–1160 · Pane
  on('ui.render', { component: 'Pane', requestId: PANE }, async ($, e) => {
    const elements = $.ui.resolve(e)
    const { Box, Button, Text } = elements
    const at = await read($, now)
    const full = (await read($, belly)) ?? { percent: 0, tokens: 0, window: 0, ate: 0, fedAt: at, burpAt: null, known: false, compactAt: null, fill: 0 }
    const limits = await read($, pantry)
    const activity = await read($, doing)
    const dieting = (await read($, armed)).length
    const plate = await read($, serving)
    const { monster, color } = await read($, look)
    const power = await read($, level)
    const helpers = scene.minions
    const hits = await read($, combo)
    const eaten = await read($, xp)
    const rank = levelOf(eaten)
    const isLoud = await read($, sound)
    const asked = await read($, waiting)
    const kept = cold(scene) ? scene.cache : null
    // Waiting on the person outranks everything: that is what needs them now.
    // About to burst outranks super mode: that line is the /compact warning.
    // What it said back to a pet or a hello shows for a moment, over its mood; hatching, it cracks.
    const { eye, say } =
      asked !== null
        ? CALLING
        : ((await read($, chat)) ?? ((await read($, egg)) ? { eye: 'o', say: '*crack* ... *crack*' } : voice(full, at, power, helpers)))
    const chain = onFire(hits)
    const remark = larder(limits)
    const tint = hex(PALETTE[color] ?? 0x3d7bff)
    const pie = await read($, slices)
    // Biggest first; free space is the empty part of the bar, not a legend entry.
    // Categories sharing a color merge (two MCP rows are one "mcp"); the five biggest
    // show, then the reserve.
    const merged = new Map<string, { color: string; short: string; kind: string; tokens: number }>()

    for (const row of pie.filter(one => one.kind !== 'free')) {
      const look = sliceLook(row.name)
      const known = merged.get(look.short)

      merged.set(look.short, { ...look, kind: row.kind, tokens: (known?.tokens ?? 0) + row.tokens })
    }

    const parts = [...merged.values()]
    const legend = [
      ...parts.filter(part => part.kind !== 'buffer').sort((a, b) => b.tokens - a.tokens).slice(0, 5),
      ...parts.filter(part => part.kind === 'buffer'),
    ]
    const entry = (part: (typeof legend)[number]) => `■ ${part.short} ${kilo(part.tokens)}  `
    const dietLine = dieting > 0 ? `eating ~${kilo(plate)} tokens from the context on your next /compact` : ''
    // The readout's height at `columns` wide, line by line, so the sprite takes only
    // what is left and the buttons never fall off the bottom of the pane.
    const lines = (columns: number) => {
      let legendLines = legend.length > 0 ? 1 : 0

      for (let used = 0, i = 0; i < legend.length; i++) {
        const w = entry(legend[i]!).length

        if (used + w > columns && used > 0) {
          legendLines += 1
          used = 0
        }
        used += w
      }

      // What it says can wrap: a gag or a fed-up line runs past a narrow readout.
      return (
        2 +
        Math.ceil(say.length / columns) +
        legendLines +
        limits.length +
        1 +
        (remark === undefined ? 0 : 1) +
        Math.ceil(dietLine.length / columns) +
        2 +
        (e.props.isFocused ? 0 : 1)
      )
    }
    // Stacked, the sprite takes up to 64 columns and the readout stays a 48 column block
    // under it. A pane too short for that (fewer than 10 sprite rows) and wide enough
    // for both puts the sprite beside the readout instead, as tall as it, twice as wide.
    const { bodyColumns, scroll } = e.props
    const wide = Math.max(16, Math.min(64, bodyColumns))
    const beside = Math.min(48, bodyColumns - 1 - 2 * Math.min(scroll.bodyRows, lines(Math.min(48, wide))))
    const isBeside =
      e.surface === 'terminal' && 'Raster' in elements && scroll.bodyRows - lines(Math.min(48, wide)) - 1 < 10 && beside >= 40
    const columns = isBeside ? beside : Math.min(48, wide)
    const readoutLines = lines(columns)
    const width = Math.max(6, Math.min(BAR, columns - 23))
    const grown = Math.round(((eaten - xpFor(rank)) / (xpFor(rank + 1) - xpFor(rank))) * width)
    const row = (name: string, percent: number, tail: string) => {
      const [used, left] = bar(percent, width)

      return (
        <Box>
          <Text dimColor>{name.padEnd(8)}</Text>
          <Text color={barColor(percent)}>{used}</Text>
          <Text dimColor>{left}</Text>
          <Text>
            {` ${Math.round(percent)}%`.padStart(5)} {tail}
          </Text>
        </Box>
      )
    }
    const layers = stack(pie, full.window || 1, width)
    let sprite

    // Raster draws on the terminal only; elsewhere it is an empty fragment.
    if (e.surface === 'terminal' && 'Raster' in elements) {
      const { Raster } = elements

      // After a hot reload the scene starts over: take the level from the banked tokens.
      if (scene.rank === 0) levelUp(scene, rank)
      // Mid-resize the pane can report no rows at all; a Raster under one cell is refused.
      const rows = isBeside ? Math.max(1, Math.min(scroll.bodyRows, readoutLines)) : Math.max(6, Math.min(22, scroll.bodyRows - readoutLines - 1))
      const across = isBeside ? Math.max(1, Math.min(2 * rows, bodyColumns - 1 - columns)) : wide

      canvas = { columns: across, rows }
      if (loop === undefined) {
        settle(scene)
        loop = $.clock.every(1000 / FPS, () => void frame($))
      }
      sprite = <Raster key="sprite" columns={across} rows={rows} cells={encode(paint(scene, across, rows * 2), across, rows, is256)} />
    } else {
      const drawing = ASCII[monster] ?? ASCII.cookie!

      sprite = (
        <Box flexDirection="column">
          {(activity === '' ? drawing.closed : drawing.open).map(line => (
            <Text color={tint}>{line.replaceAll('E', eye)}</Text>
          ))}
        </Box>
      )
    }

    const readout = (
      <Box flexDirection="column" width={columns}>
        <Text color={tint} bold>
          {say}
        </Text>
        <Text dimColor wrap="truncate-end">
          {asked !== null
            ? waitLine(asked)
            : activity !== ''
              ? `> ${activity}${chain}`
              : kept !== null
                ? `cold cache: next prompt re-reads ~${kilo(kept.tokens)} uncached`
                : full.ate > 0
                  ? `last bite +${kilo(full.ate)}, fed ${span(at - full.fedAt)} ago`
                  : `fed ${span(at - full.fedAt)} ago`}
        </Text>
        {pie.length === 0 ? (
          row('belly', full.percent, `${kilo(full.tokens)}/${kilo(full.window)}`)
        ) : (
          <Box>
            <Text dimColor>{'belly'.padEnd(8)}</Text>
            {layers.content.map(part => (
              <Text color={part.color}>{'█'.repeat(part.cells)}</Text>
            ))}
            <Text dimColor>{'░'.repeat(layers.free)}</Text>
            {layers.reserve.map(part => (
              <Text color={part.color}>{'▒'.repeat(part.cells)}</Text>
hooks/register.tsx lines 956–999 · Band
  on('ui.render', { component: 'AbovePrompt' }, async ($, e, next) => {
    if (e.props.hasSurvey) return next(e)

    const pane = (await $.ui.panes()).find(one => one.id === PANE)

    if (pane?.isShown === true && pane.isPlaced) return next(e)

    const { Box, Text } = $.ui.resolve(e)
    const at = await read($, now)
    const full = await read($, belly)

    if (full === null) return next(e)

    const limits = await read($, pantry)
    const activity = await read($, doing)
    const power = await read($, level)
    const hits = await read($, combo)
    const asked = await read($, waiting)
    const tint = hex(PALETTE[(await read($, look)).color] ?? 0x3d7bff)
    const { eye, say } = asked !== null ? CALLING : voice(full, at, power, scene.minions)
    const [used, left] = bar(full.percent, 8)
    const pieces = [
      ...limits.map(limit => `  ${limitName(limit.kind)} ${Math.round(limit.percentUsed)}%`),
      '  /token-monster',
    ]
    const head = `(${eye})(${eye}) ${asked !== null ? waitLine(asked) : activity !== '' ? `> ${activity}${onFire(hits)}` : say}`
    const meter = ` ${used}${left} ${full.percent}%`
    const room = e.props.bodyColumns - 2
    // What fits: the face and words first, cut short if they must, then the gauges.
    const words = head.slice(0, Math.max(10, room - meter.length))
    const tail = pieces.filter((_, index) => words.length + meter.length + pieces.slice(0, index + 1).join('').length <= room)

    return (
      <Box paddingX={1}>
        <Text color={tint} bold>
          {words}
        </Text>
        <Text color={barColor(full.percent)}>{` ${used}`}</Text>
        <Text dimColor>{left}</Text>
        <Text>{` ${full.percent}%`}</Text>
        <Text dimColor>{tail.join('')}</Text>
      </Box>
    )
  })
Licence text (MIT)
MIT License

Copyright (c) 2026 Carl Igelström

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

What its code calls

env varsdrives Claudetool callsremembers

The design, read from code

Drawn from the mod's source at the commit read, not from a run: a list is drawn three times, a condition takes its first branch that draws in the desktop app, and a value only the run time knows is shown as a made-up sample (dotted underline) or left out. Colours and type are this site's.

What its code shows

Read from the source at commit a73ac7e31176 on 2026-10-06. The first group decides whether a mod is listed; the rest is for you to weigh. A later commit is not read until the next crawl.

Decides the listing: code you can check
Entry readEvery module hooks/hooks.json names was read.hooks/register.tsx
ParsesEvery file parses as TypeScript or JavaScript.6 files parsed
All its code is in the modEvery import is a file of the mod or the engine's own module; no packages, no require.all its code is in the mod
ReadableNo minified lines, no eval or new Function, no import of a computed path, no encoded blobs.no minified code, no eval, no encoded blobs
Calls in the openNetwork and programs are reached as $.http.fetch and $.process.run in place, never passed around.every call outside goes through $ in the open
For you to weigh before installing
Where it drawsThe terminal, the desktop app, both, or nothing (hooks only: a guard or a prompt rewriter), as its code says. Shown, never a reason to leave a mod out.draws in the terminal and the desktop app, the same in both
Install lineWhether its repository's own .claude-plugin/marketplace.json lists it, so it installs from that marketplace with the lines on its page.listed in its repository's .claude-plugin/marketplace.json: installs from there
Programs on WindowsWhether every program it starts through $.process exists on Windows (tail, date, open, osascript, /usr/… do not).runs no program a Windows PC lacks
NetworkWhether every fetch names its https host in the code.no network
ProgramsWhether every program it starts is named in the code and is not a shell, an interpreter or a network tool.starts no programs
Reads and sendsWhether it both reads files or environment variables and reaches the network.reaches no network
Keys in the sourceWhether the source holds what looks like an API key or a private key.no keys in the source
LicenceAn open licence (MIT, Apache-2.0, BSD, ISC, Unlicense, 0BSD, CC0) with its text lets modscode show its code; otherwise the code is linked.MIT

This is a reading of the code text, not a security review: it does not run the mod, and it cannot see what a program the mod starts does. The check before installing is yours. How mods are chosen

Install it

Check it yourself before you install it. Mods run unsandboxed, with your permissions, and modscode does not vouch for what this code does. Read the code below (or run claude plugin validate . in its folder), weigh what it reaches, and install the commit you read.

Its repository is its marketplace. Add that marketplace (in the terminal with these commands, or in the desktop app's plugin settings) and install the mod from it:

/plugin marketplace add ugglr/claude-token-monster
/plugin install token-monster@token-monster

This installs the marketplace's latest commit, which may not be the one read here (a73ac7e31176). Compare them before you install.

Ask Claude about it

With the modscode connector added, Claude can read this design, what its code reaches and its code, and build on them. Ask it like this:

Read the modscode design "ugglr-token-monster" with its code and make me a pane like it

Search them from Claude: the MCP connector

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